Chisel tool with shock-absorbing handle



Sept. 13,- 1955 B. L. POLKOSNIK 2,717,618

CHISEL TOOL WITH SHOCK-ABSORBING HANDLE Filed Nov. 19, 1952 3i f 28 J Si United States Patent CHISEL TOOL WITH SHQCK-ABSORBING HANDLE BernardL. Polkosnik, Bridgeport, Conn., assignor to General Hardware Mfg. Co.Inc., New York, N. 1., a corporation of New York Application November19, 1952, Serial No. 321,480

3 Claims. (Cl. 14524) The present invention relates to handles for handtools of the type which are used by being struck with a hammer ormallet.

The principal object of this invention is to provide a novel andimproved shock-absorbing handle construction for hand tools of thecharacter mentioned.

A further object is to provide a novel and improved handle of the kindset forth which is adaptable to be included in the manufacture of toolsused with a hammer, which handle is simple and reasonably cheap to makeand which is eflicient in carrying out the purposes for which it isdesigned.

Other objects and advantages will become apparent as this disclosureproceeds.

in the accompanying drawings forming part of this specification, similarcharacters of reference indicate corresponding parts in all the views.

I have chosen to illustrate the practice of this invention by specialbut by no means exclusive application to a carpenters butt gauge.

Fig. l is a perspective view showing such a butt gauge provided with ashock-absorbing handle constructed in accordance with the teachings ofthis invention.

Fig. 2 is a similar view of the article minus the handle.

Fig. 3 is an end view of Fig. 1.

Fig. 4 is like Fig. 3, but of a slightly modified construction.

Fig. 5 is a section taken at lines 5-5 in Fig. 2.

Fig. 6 is a section taken at either set of lines 66 in Fig. 2.

Fig. 7 is an enlarged end view of Fig. 1, showing the position thecomponents of the handle assume when the tool is held in hand by thehandle part, while the butt gauge part rests on the edge of a door andis being struck by a hammer; the hand and hammer being not shown.

In the drawings, the numeral designates generally the complete toolselected to explain this invention. The butt gage part is an openrectangular box structure 16 which is positioned inverted. Onelongitudinal wall 17 and both end walls 18, 18 are chisel cuttingblades. The other longitudinal wall 17 has laterally extending lugs 19and downwardly extending lugs 20. The handle which is denoted generallyas 21, extends laterally from the wall 17', and is secured by rivets 22to the underside of the lugs 19. The lugs serve to position the buttgauge part 23 on for instance a door edge 24 which is to be marked for ahinge plate cut-out. The numeral 25 points to a corner formed byadjacent cutting blades. The underside of the floor of the box structure16, is designated by the numeral 26, and is the surface hit with ahammer; such surface being on top in the use of the tool.

The handle member 21 is comprised of two blades 27 and 28 which are ofspring steel and are comparatively of thin stock. These blades are oneover the other and in the embodiment shown in Fig. l, are in surfacecontact. The upper one is of a dimension to overlap only part of thelower one. The exposed longitudinal edge 2,717,618 Eatented Sept. 13,1955 of the lower one 28, where the tool is held in hand, has anenlargement which may be a piece of bar stock 29 secured therealong. Itis evident that both blades 27, 28 are mounted in cantilever fashion.

In use, a right-handed craftsman with hammer in right hand, will holdthe tool 15 in left hand whereby fingers of the left hand are under theblade 28, with the thumb on the bar 29. So held, the tool is placed sothat the butt gauge part 23 is atop the surface 24, with lugs 20 againstthe door face 24. Upon striking surface 26 with the hammer, the blades27, 28, due to the impact, will assume the downwardly arched, flexedposition shown in Fig. 7, the upper blade acting on the lower blade byexerting a restraining force shown by the arrow A. The user willexperience no shock.

In the modified embodiment shown in Fig. 4, the upper blade 30, alongits free edge, has a comparatively short downward flange 31, the freeedge of which contacts the upper surface of the lower blade 28.

The action of the upper blade spring is to provide a downward force onthe lower blade spring 28, intermediate the free edge of the latter andthe tool body proper. This construction absorbs the shock and preventsthe bending or even breaking off of the blade spring 28 at the lugs 19,which would occur were the upper blade spring omitted.

This invention is capable of numerous forms and various applicationswithout departing from the essential features herein disclosed. It istherefore intended and desired that the embodiments shown herein shallbe deemed illustrative and not restrictive and that the patent shallcover all patentable novelty herein set forth; reference being had tothe following claims rather than to the specific description andparticular adaptation herein, to indicate the scope of this invention.

I claim:

1. In an article of the character described, a plate member to be struckon the top surface thereof with a hammer, a plurality of chisel bladesextending downwardly from said plate member, a flange extendingdownwardly from said plate along one edge of said plate, a pair offlexible blade spring members positioned one below the other and securedto the said flange to extend laterally therefrom in cantilever fashion;the lower blade spring member extending further from the said flangethan the upper one and adapted to be held in hand in the region thereofwhich extends beyond the upper one; said blade spring members being inconstant contact at least at a predetermined distance away from the saidflange.

2. The article as defined in claim 1, wherein the upper blade springmember is provided with a downward flange at a distance from the flangedepending from the plate and wherein only the said flange on the upperblade spring member contacts the lower blade spring member.

3. The article as defined in claim 1, wherein the upper blade springmember contacts the lower one only along that edge of the former whichis furthest from the flange.

References Cited in the file of this patent UNITED STATES PATENTS281,217 Wiedmann July 10, 1883 604,379 Flyckt May 24, 1898 1,177,472Bartlett Mar. 28, 1916 1,428,015 Dienner Sept. 5, 1922 1,895,124 Craftset a1 Jan. 24, 1933 1,927,973 Bull Sept. 26, 1933 2,547,489 Priebe Apr.3, 1951 FOREIGN PATENTS 658,550 France June 5, 1929

